probleme whit dvbt2 golden media spark 7162

[cloud71]

with the last image, the 11742, decoder spark on 7162 does not work well scanning dvbt2. instead before with the previous images I could do a scan a single transponder, so as to be able to tune all channels. Now if I tell you to scan a 682mhz or other frequency, once I start I scan only scans the frequency 474 mhz, I wanted to know if there is a solution, thanks in advance